second job he has to offer something people find attractive so the challenge for him is getting the mix right. the challenge for the president is staying on script, talking about howshe's been working for the middle-class and not getting knocked off by governor romney who he doesn't have a great deal of personal regard for. so he has to not look defensive. >> pelley: john, thank you very much. we'll be back later tonight with cbs news live coverage of the debate. that's 9:00 eastern time and 6:00 in the west. today secretary of state hillary clinton promised a full and open investigation into the terror attack on the u.s. consulate in benghazi, libya, three weeks ago. four americans, you'll recall, were killed, including ambassador chris stevens. there are a lot of questions about what happened. margaret brennan has been following this story and she's at the start tonight. margaret? >> reporter: good evening, scott. the cretary of state reacted to pressure from the public, the press, and the house oversight committee to address the controversy around the administration's response to that atta